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Teepan.

> Senior Software Engineer · Backend · 8+ years · Node.js · TypeScript · PostgreSQL

Senior Software Engineer, backend-focused, with 8+ years of experience. I started on the front-end, moved to full-stack, and now spend most of my time on backend architecture.

Over 6 years at Radio France, I went from shipping full-stack features to designing and building the backend APIs and services (Node.js, TypeScript, PostgreSQL) behind products used by several million people. My focus: API design (REST and GraphQL), query optimization, caching, and production reliability.

Open to remote opportunities. French and English.

languages→ french · englishcurrently→ Radio France · 2020 - present

./by-the-numbers

metrics.md

years of production code

20s → 200ms

PostgreSQL query after targeted indexes

~100 → batched

upstream calls per request, batched with Dataloader

15-30

students per class

./featured

case-study.md

FEATUREDRadio France · Senior Software Engineer

Sept 2020 - Present · 6 years

role senior software engineerscope backend APIs + servicesscale several million usersstack Node.js · TypeScript · PostgreSQL · GraphQL

Went from shipping full-stack features to designing and building the backend APIs and services (Node.js, TypeScript, PostgreSQL) behind products used by several million people. Focus: API design (REST and GraphQL), query optimization, caching, and production reliability.

Co-designed and built the BFF/app redesign: business logic moved out of the mobile app into the BFF (Node.js, Fastify, Apollo Server), which returns design-system-ready components. The app became a pure rendering layer.
Optimized the GraphQL API aggregating dozens of internal services: replaced ~100 individual calls per request with batched Dataloader queries, cutting request volume and cache footprint.
Replaced a Vary-header image caching strategy with a dedicated image service serving on-demand presets, eliminating per-device cache duplication.
Diagnosed a PostgreSQL query pattern causing full table scans (up to 20s); added targeted indexes, cutting response time to 200-500ms.
Led the root-cause analysis of a 7-hour production outage traced to unvalidated contributor input; introduced data validation safeguards.
Built full-stack features on radiofrance.fr (Svelte/SvelteKit) and internal back-office tools (React/Symfony); deployed services on Kubernetes end-to-end (ingress, workloads, Nginx, GitLab CI/CD, Grafana).

Node.jsTypeScriptFastifyApollo ServerGraphQLDataloaderRESTPostgreSQLSvelte/SvelteKitReactSymfonyKubernetesNginxGitLab CI/CDGrafana

./experience

01 entry

history.log

prior roles

GroupamaFront-End Developer

Sept 2018 - Aug 2020

Nanterre, France

Built and maintained insurance sales funnels (home, life/accident, auto) in Nuxt.js/Vue 3, serving several million visits/month.
Drove front-end performance improvements on groupama.fr: eliminated unnecessary re-renders, optimized CSS/JS footprint, wrote A/B testing scripts.

Nuxt.jsVue 3CSSJavaScript

./skills

filter →

TypeScript · languagesdaily

JavaScript · languagesdaily

Go · languagesfamiliar

SQL · languagesstrong

Node.js · backenddaily

Fastify · backenddaily

Express · backendstrong

Apollo Server · backenddaily

GraphQL · backenddaily

REST · backenddaily

Redis · backendstrong

RabbitMQ · backendstrong

React · frontenddaily

Next.js · frontendstrong

Svelte / SvelteKit · frontendstrong

Vue.js / Nuxt.js · frontendstrong

Tailwind · frontendstrong

PostgreSQL · databasesdaily

Drizzle ORM · databasesstrong

Query optimization · databasesdaily

Data modeling · databasesstrong

Docker · infrastructuredaily

Kubernetes · infrastructuredaily

GitLab CI/CD · infrastructurestrong

AWS · infrastructurefamiliar

Terraform · infrastructurefamiliar

Ansible · infrastructurefamiliar

Linux · infrastructurestrong

Grafana · monitoringstrong

Datadog · monitoringstrong

Sentry · monitoringstrong

Claude API · ai toolingdaily

Claude Code · ai toolingdaily

Code review · practicedaily

Technical mentoring · practicedaily

Async communication · practicedaily

./teaching

since 2022

Technical Instructor & Jury Member

Freelance · 2022 - Present

Freelance technical instructor at French engineering schools: TypeScript, Node.js, GraphQL, Web Performance, and Git workflows. Jury member for final-year thesis defenses.

./education

Master of Web and Mobile Engineering · RNCP32023

IIM Digital School

Nanterre, France

Bachelor of Web Development · RNCP32043

HETIC

Montreuil, France

teepan:~$ contact --reach-out

I help product teams ship without thinking about plumbing.

$ open to new opportunities · french · english

linkedin.com/in/paartheepan-r↗email · contact@teepan.fr↗resume · download.pdf↗